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Science, New Series, Vol. 10, No. 251, Oct. 20, 1899


Previous Issue: New Series, Vol. 10, No. 250, Oct. 13, 1899
Next Issue: New Series, Vol. 10, No. 252, Oct. 27, 1899


Front Matter (2 pp.)


The American Association for the Advancement of Science
Report on Progress in Non-Euclidean Geometry, pp. 545-557
George Bruce Halsted
Botany at the Columbus Meeting of the American Association for the Advancement of Science, pp. 557-567
W. A. Kellerman
Sullivant Day, pp. 567-568
Elizabeth G. Britton


The British Association for the Advancement of Science
Section D (Zoology) at the Dover Meeting of the British Association, pp. 568-570
W. A. Herdman


The Diœcism of the Fig in Its Bearing Upon Caprification, pp. 570-574
Walter T. Swingle


Scientific Books
----------------, pp. 574-575
Praxis und Theorie der Zellen- und Befruchtungslehre
Valentin Häcker
Review author[s]: E. B. W.
----------------, pp. 575-577
The Teaching Botanist
William F. Ganong
Review author[s]: Francis E. Lloyd
----------------, pp. 577-578
Reye's Geometrie der Lage. Lectures on Geometry of Position
Theodore Reye
Review author[s]: J. H. Tanner


Scientific Journals and Articles, p. 578
Societies and Academies, pp. 578-579


Discussion and Correspondence
`The Perception of Horizontal and of Vertical Lines.', pp. 579-580
Joseph Jastrow


The Third Princeton Expedition to Patagonia, pp. 580-581
A Long Photographic Telescope, p. 581
Edward C. Pickering

Scientific Notes and News, pp. 581-583
University and Educational News, pp. 583-584

Previous Issue: New Series, Vol. 10, No. 250, Oct. 13, 1899
Next Issue: New Series, Vol. 10, No. 252, Oct. 27, 1899



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